Receiving data over serial port

slippygod · #1 22-May-2006, 16:28

I'm programming a C++ console app that receives data over the serial port and does some number crunching on it. I got the serial library over at http://www.codeproject.com/system/serial.asp . I'm hoping someone here is familiar with it, because I'm having problems using it.
First all, I know that the input data is a series of 6 bytes at a baud rate of 115200, no handshaking, and theoretically continues forever. I am using a serial port monitoring program and can confirm that this data is being sent properly. The problem is that my program receives the data, but at varying byte intervals, ranging from 9 to too-many-to-count. There are no control codes or anything in the stream, so if it doesn't read in the 6 bytes per read then the rest of the data won't be correct.

CPP / C++ / C Code:

	serial_in.SetupReadTimeouts(CSerial::EReadTimeoutNonblocking);

	serial_in.SetMask(CSerial::EEventRecv);

	do
	{
		serial_in.WaitEvent();

		DWORD dwBytesRead = 0;
		char szBuffer[7];

		do
		{
			serial_in.Read(szBuffer,sizeof(szBuffer)-1,&dwBytesRead);
			if (dwBytesRead > 0)
			{
				szBuffer[dwBytesRead] = '\0';

		
			}
		}
		while (dwBytesRead == sizeof(szBuffer)-1);
		
		[do calculations here]
	}
	while(true)

I figure the code won't mean much to people who haven't used this specific library, but I'm hoping that someone can give me a hand.
Any help would be appreciated!

soldstatic · #2 03-Aug-2006, 08:32

i dont know anything about that library, but i looked at it when I was going to do all my serial port stuff. ended up finding some really good howto kinda stuff, which i basically threw together in this post:

http://www.gidforums.com/showthread.php?p=46273

i had a ton of trouble trying to get this and that class working and eventually just had to dig in and do it that way^, but it turned out to be really easy since I basically copy and pasted the code into my prog and it worked.

maybe itll help you? if not good luck!

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Receiving data over serial port

Re: Receiving data over serial port